Sanitary pump.



. M. CUPPEL.

SANITARY PUMP.

APPLIUATION FILED MAY a1. 1913.

Patented May 12, 19M

3 SHEETS-SHEET 1.

mf 33 R INVENTOR WITNESSES (7a2/'les M Car/O l.

COLUMBIA PLANoGRAPH co.. WASHINGTON. B. c.

G. M. CUPPEL.

SANITARY PUMP.

APPLIOATION FILED MAY a1, 191s.

1,096,686. Patented May 12, 1914.

3 SHEETS-SHEET 2.

WITNESSES INVENTOR Oka/'Zes /f Cap/Del COLUMBIA PLANOGNAI'M Co..wAsn|NOTON. bic.

C. M. CUPPEL.

SANITARY PUMP.

APPLIUATION FILED MAY a1, 1913.

1,096,686, Patented May 12; 1914.

3 SHEETS-SHEET 3.

WITNESSES INVENTOR COLUMBIA PLANoaRAPH co.. WASHINGTON. D. c.

UNITED STATES PATENT GFFICE.

CHARLES MORTON CUPPL, OF MILWAUKEE, WISCONSIN.

SANITARY PUMP.

T0 all whom it may concern Be it known that I, CHARLES M. CUPPEL, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Sanitary Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The primary object of this invention is to provide a simple and highly eiiicient pump especially designed for handling milk, although it may be used for other liquids. And further objects are to provide a pump having a maximum of capacity with a minimum of power; and one which will be composed of comparatively few parts, and hence not liable to readily get out of order, and which may be easily disconnected or assembled.

In the accompanying drawings, Figure 1 is a vertical longitudinal sectional view. Fig. 2 is a vertical transverse section. Fig. 3 is a plan view. Fig. 4l is an end elevation.

Referring to the drawings, 1 designates a cylinder having at or about its center, in its under-side, an inlet opening 2, and diametrically opposite thereto, in its top, an outletopening 3. The cylinder is supported at its center by a chambered casing 4, having a supply opening 5 through which the milk or other liquid is supplied to the pump. This chambered casing is formed on its upper surface to receive a depending flange of the cylinder, so as to insure a tight joint. The outlet-opening 3 opens into a chambered casing 6, having an opening 7 from which the delivery-pipe (not shown) extends. The under-side of this casing 6 is formed to receive a flange extendingfrom the top of the cylinder so as to provide a tight joint. A yoke 8 is pivoted at the lower ends of its side-members to opposite sides of the casing 4L, and in its connecting portion said yoke carries a binding-screw 9, which is designed to engage the outlet-casing 6, at the center thereof, so that both the casings l and 6 may be firmly secured to the cylinder. By merely loosening screw 9 these several parts may be disconnected.

The cylinder 1 at one end is closed by a head 10, which has a fixed support 12, and is provided at its center with a stuffing-box through which is passed a piston rod 13.

Specification of Letters Patent.

Application filed May 31, 1913.

Patented May 12, 191.4.

Serial No. 770,997.

The other end of cylinder 1 is closed by a removable head 111-, which is locked in position by a binding-screw 15, carried by a yoke 16 paralleling the axis of the cylinder and having the free ends of its side-members pivotally secured to the fixed head l0 at diametrically opposite points thereof. By loosening screw 15 cylinder head 14 may be readily removed, and by a relative movement between the cylinder and its other head 10 access may be readily had to the interior of the cylinder.

The piston is mounted on rod 13, and designed to be reciprocated within cylinder l by any suitable motor. I have shown the piston as `having at its opposite ends rings 17, and a longitudinally extended horizontal dividing partition 18, which separates the piston into receiving and discharging chambers, each chamber being cut away to form communication with the inlet and outlets, respectively. In the end walls of the piston, and in line with the receiving charnber, are oppositely disposed ports 19, which are controlled by two outwardly-movable valves 20, the rods of which are shown as telescoping so as to permit either valve to move independently of the other, and to conjointly form guides for each other. The valve rods are shown as surrounded by a coil spring 21, which is secured to the respective rods to normally hold valves 20 seated over the ports 19.

In the end walls of the piston, in line with the discharging chamber, are formed ports 22, over which are seated inwardly-opening valves 23, the rods of which telescope each other, and said rods are encircled by a spring 24, the tendency of which is to hold valves 23 to their seats. The valves of both sets are shown as guided by short bars 25. It will be noted that while the inlet-valves 2O move outwardly to open ports 19, the discharge-valves 26 move inwardly to open ports 22.

In practice, as the piston is moved in one direction, one of the valves 20 is unseatcd while the other remains seated, and this is also true in respect to valves 23, but with this difference: the valves 2() and 23 which are opened are at opposite ends of the piston. In other words, as the piston travels in one direction, the valve 20 at the rear or trail end is unseated by the pressure within the receiving chamber and the liquid will pass into the space in rear of the piston.

At the same time, the upper valve 23 at the forward or advancing end of the piston will be automatically unseated by the pressure of the liquid between the forward end of the pist-on and the cylinder head, and such liquid will pass from the discharge chamber into the discharge casing. The same pressure which eHects the unseating of the outlet-valve insures the seating of the inletvalve at the same end of the cylinder.

The advantages of my invention will be apparent to those skilled in the art. It will be observed that I have provided a sanitary pump which is especially adapted for handling milk, although it may be used for other liquids. The parts may be readily assembled and disconnected, and, by reason of the described valve arrangement in the reciprocating piston, I have found in actual practice that I am enabled to obtain a maximum capacity with comparatively little power. There are but few parts, and hence the danger of derangement is minimized. A pump having the characteristics of my invention may be manufactured at comparatively little expense.

I claim as my invention:

l. A sanitary milk pump comprising a horizontal]y-disposed piston cylinder having lower and upper oppositely-disposed openings forming an inlet and an outlet, a chamber upon which said cylinder is mounted, a second chamber mounted on said cylinder, a yoke pivoted to the first mentioned chamber and spanning said cylinder and said second chamber, a binding screw carried b-y said yoke and engaging said second chamber, and a reciprocating piston in said cylinder having valvecontrolled receiving and discharge chambers.

Q.. A sanitary milk pump comprising a horizontally-disposed piston cylinder having lower and upper oppositely disposed openings forming an inlet and an outlet intermediate its ends, a iixedly mounted head closing one end of said cylinder, a second head for the other end of said cylinder, a yoke pivoted to the first mentioned head and having a screw for engaging the second mentioned head, a chamber upon which said cylinder is mounted, a second chamber mounted on said cylinder, a yoke pivoted to the first mentioned chamber and spanning said cylinder and said second chamber, a binding screw carried by said yoke for engaging said second chamber, and a reciproeating piston in said cylinder having valvecontrolled receiving and discharge chambers.

8. A sanitary milk pump comprising ahorizontally disposed piston cylinder having inlet and outlet openings intermediate its ends, a piston slidable in said cylinder comprising two rings and receiving and discharging chambers, said chambers having each two openings Vthrough said piston rings, two outwardly opening valves for control.- ling the ports of the receiving chamber, a spring for normally holding said valves seated, two inwardly opening valves for controlling the ports of the discharge chamber; and a spring for normally holding said latter valves seated, both sets of valves having telescoping rods.

4. A sanitary milk pump comprising a horizontally disposed piston `cylinder having oppositely disposed inlet and outlet openings, an inlet chamber upon which said cylinder is mounted, an outlet chamber mounted on said cylinder, a yoke binding said chamber to said cylinder, a fixedly supported head for one end of said cylinder, a second head for the other end of said cylinder, a pivoted yoke forholding said heads and cylinder together, apiston in said cylinder having end rings and receiving and discharge chambers, outwardly opening valves controlling ports from said receiving chamber, and inwardly opening valves for controlling ports in said discharge chamber.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

CHARLES MORTON CUPPEL.

Witnesses CARL B. RIX, Lorrin IV. CLoUGi-I.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of IPatents. Washington, D. C. 

